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Detroit — The Tigers on Friday added three of their top pitching prospects to the 40-man roster, thus protecting them against the Rule 5 draft, which will take place Dec. 10. 

They purchased the contracts of right-handers Michael Fulmer and Montreal Robertson, both from Double A Erie, and left-hander Jairo Labourt from Single A Lakeland. 

Fulmer, 22, was acquired from the Mets in the Yoenis Cespedes trade on July 31. Labourt, 21, was part of the package the Tigers got from Toronto for David Price. Robertson was the club’s 29th round pick in 2011. 

Between Single-A and Double-A last season, Fulmer was 10-3 with a 2.24 ERA, striking out 125 in 124⅔ innings. He was named Double-A Eastern League pitcher of the year. He has an outside shot at winning a roster spot with the Tigers next season.

Robertson, 25, has been a late-bloomer in the Tigers organization, but he’s making up for lost time. He’s allowed just three runs in 14⅔ innings at the Arizona Fall League. 

Labourt, currently pitching in the Dominican Winter League, gave up 66 runs in 116 innings in Single-A last year, but he also struck out 104. 

The Tigers still have two open spots on the 40-man roster.

chris.mccosky@detroitnews.com

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